MESON Chess Problem Database

Problem Display
PID: 108430 (5N2/B3p3/1r2rp2/2k1bR2/P7/8/BQN5/K7 w - - 0 1)

Hoek, Willem

BCF, 1952-1953

5N2/B3p3/1r2rp2/2k1bR2/P7/8/BQN5/K7

#2

8 + 6

6490 yacpdb 2009
5454 Near Snap 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Rc6
      • 2.Qd4#
    • 1...Rd6
      • 2.Qc3#
  • Tries
    • 1.Sd4?
      • 1...Kd6
        • 2.Qxb6#
      • 1...Rd6
        • 2.Qc3#
      • 1...Rc6!
  • Keys
    • 1.Kb1!
      • 1...Kc6
        • 2.Qxb6#
      • 1...Kd6
        • 2.Qxb6#
      • 1...Rc6
        • 2.Qb4#
      • 1...Rd6
        • 2.Qb5#

Anticipated by 158921(1924), 178(1950)

This anticipates 27770(1962)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(d);SBLOCK::QAB1(C)
    • R(d);SBLOCK::QAR2(C)
  • Tries
    • Try
      • S(D);N_SPINQ(C)
      • Vars
        • K(a);N_SPINB(b),N_SPINR(c),S_FLIGHT::QAR2(C),XR(c)
        • R(d);SBLOCK::QAR2(C)
      • Refutation
        • R(d);
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • K(a);N_SPINB(b),N_SPINR(c),P-FLIGHT::QAR1(C),XR(c)
      • K(a);N_SPINB(b),N_SPINR(c),S_FLIGHT::QAR2(C),XR(c)
      • R(d);SBLOCK::QAB1(C)
      • R(d);SBLOCK::QAR1(C)
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